X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=wmiistatus.c;h=5c6630201d993683b66eb12b0178ded18f807c60;hb=62fe9d12105d2aeab21762850a8140793087b9aa;hp=d6ebc1406b29ebf0f4fc5027f78f456941f56758;hpb=949728e8c5a7855663bcd6f6c8b0eab7af055ac4;p=i3%2Fi3status diff --git a/wmiistatus.c b/wmiistatus.c index d6ebc14..5c66302 100644 --- a/wmiistatus.c +++ b/wmiistatus.c @@ -1,3 +1,36 @@ +/* + * Generates a status line for use with wmii or other minimal window managers + * + * + * Copyright (c) 2008-2009 Michael Stapelberg and contributors + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * * Redistributions in binary form must reproduce the above copyright notice, this + * list of conditions and the following disclaimer in the documentation and/or other + * materials provided with the distribution. + * + * * Neither the name of Michael Stapelberg nor the names of contributors + * may be used to endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + */ #include #include #include @@ -5,202 +38,475 @@ #include #include #include +#include #include #include +#include #include #include #include #include #include #include +#include +#include +#include + +#ifdef LINUX +#include +#include +#else +/* TODO: correctly check for *BSD */ +#include +#include +#include +#endif + +#define _IS_WMIISTATUS_C +#include "wmiistatus.h" +#undef _IS_WMIISTATUS_C +#include "config.h" + +/* socket file descriptor for general purposes */ +static int general_socket; -const char *wlan_interface = "wlan0"; -const char *eth_interface = "eth0"; +/* + * This function just concats two strings in place, it should only be used + * for concatting order to the name of a file or concatting color codes. + * Otherwise, the buffer size would have to be increased. + * + */ +static char *concat(const char *str1, const char *str2) { + static char concatbuf[32]; + (void)snprintf(concatbuf, sizeof(concatbuf), "%s%s", str1, str2); + return concatbuf; +} -// TODO: run-watches, z.B. -// "/var/run/dhcp*.pid" --> checkt ob's das file gibt, ob der prozess läuft und zeigt dann yes/no an -// "/var/run/vpnc*.pid" +/* + * Cleans wmii's /rbar directory by deleting all regular files + * + */ +static void cleanup_rbar_dir() { + struct dirent *ent; + DIR *dir; + char pathbuf[strlen(wmii_path)+256+1]; -char output[512]; -bool first_push = true; + if ((dir = opendir(wmii_path)) == NULL) + exit(EXIT_FAILURE); + while ((ent = readdir(dir)) != NULL) { + if (ent->d_type == DT_REG) { + (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, ent->d_name); + if (unlink(pathbuf) == -1) + exit(EXIT_FAILURE); + } + } + + (void)closedir(dir); +} + +/* + * Creates the specified file in wmii's /rbar directory with + * correct modes and initializes colors if colormode is enabled + * + */ +static void create_file(const char *name) { + char pathbuf[strlen(wmii_path)+256+1]; + int fd; + int flags = O_CREAT | O_WRONLY; + struct stat statbuf; + + (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name); + + /* Overwrite file's contents if it exists */ + if (stat(pathbuf, &statbuf) >= 0) + flags |= O_TRUNC; + + if ((fd = open(pathbuf, flags, S_IRUSR | S_IWUSR)) < 0) + exit(EXIT_FAILURE); + if (use_colors) { + char *tmp = concat("#888888 ", wmii_normcolors); + if (write(fd, tmp, strlen(tmp)) != (ssize_t)strlen(tmp)) + exit(EXIT_FAILURE); + } + (void)close(fd); +} + +/* + * Waits until wmii_path/rbar exists (= the filesystem gets mounted), + * cleans up all files and creates the needed files + * + */ +static void setup(void) { + unsigned int i; + struct stat statbuf; + char pathbuf[512]; + + /* Wait until wmii_path/rbar exists */ + for (; stat(wmii_path, &statbuf) < 0; sleep(interval)); + + cleanup_rbar_dir(); + if (wlan_interface) + create_file(concat(order[ORDER_WLAN],"wlan")); + if (eth_interface) + create_file(concat(order[ORDER_ETH],"eth")); + if (battery_path) + create_file(concat(order[ORDER_BATTERY],"battery")); + create_file(concat(order[ORDER_LOAD],"load")); + if (time_format) + create_file(concat(order[ORDER_TIME],"time")); + for (i = 0; i < num_run_watches; i += 2) { + snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]); + create_file(pathbuf); + } +} + +/* + * Writes the given message in the corresponding file in wmii's /rbar directory + * + */ +static void write_to_statusbar(const char *name, const char *message) { + char pathbuf[strlen(wmii_path)+256+1]; + int fd; + + (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name); + if ((fd = open(pathbuf, O_RDWR)) == -1) { + /* Try to re-setup stuff and just continue */ + setup(); + return; + } + if (write(fd, message, strlen(message)) != (ssize_t)strlen(message)) + exit(EXIT_FAILURE); + (void)close(fd); +} + +/* + * Writes an errormessage to statusbar + * + */ +static void write_error_to_statusbar(const char *message) { + cleanup_rbar_dir(); + create_file("error"); + write_to_statusbar("error", message); +} + +/* + * Write errormessage to statusbar and exit + * + */ +void die(const char *fmt, ...) { + if (wmii_path != NULL) { + char buffer[512]; + va_list ap; + va_start(ap, fmt); + (void)vsnprintf(buffer, sizeof(buffer), fmt, ap); + va_end(ap); + + write_error_to_statusbar(buffer); + } + exit(EXIT_FAILURE); +} + +/* + * Skip the given character for exactly 'amount' times, returns + * a pointer to the first non-'character' character in 'input'. + * + */ static char *skip_character(char *input, char character, int amount) { char *walk; - int len = strlen(input), - blanks = 0; + size_t len = strlen(input); + int blanks = 0; - for (walk = input; ((walk - input) < len) && (blanks < amount); walk++) + for (walk = input; ((size_t)(walk - input) < len) && (blanks < amount); walk++) if (*walk == character) blanks++; return (walk == input ? walk : walk-1); } -static void push_part(const char *input, const int n) { - if (first_push) - first_push = false; - else - strncpy(output+strlen(output), " | ", strlen(" | ")); - strncpy(output+strlen(output), input, n); -} - /* - * Get battery information from /sys. Note that it uses the design capacity to calculate the percentage, - * not the full capacity. + * Get battery information from /sys. Note that it uses the design capacity to + * calculate the percentage, not the last full capacity, so you can see how + * worn off your battery is. * */ static char *get_battery_info() { char buf[1024]; - static char output[512]; - char *walk, *last = buf; - int fd = open("/sys/class/power_supply/BAT0/uevent", O_RDONLY); + static char part[512]; + char *walk, *last; + int fd; int full_design = -1, remaining = -1, present_rate = -1; - bool charging = false; - memset(output, '\0', sizeof(output)); - read(fd, buf, sizeof(buf)); - for (walk = buf; (walk-buf) < 1024; walk++) + charging_status_t status = CS_DISCHARGING; + + if ((fd = open(battery_path, O_RDONLY)) == -1) + return "No battery found"; + + memset(part, 0, sizeof(part)); + (void)read(fd, buf, sizeof(buf)); + for (walk = buf, last = buf; (walk-buf) < 1024; walk++) if (*walk == '=') { - if (strncmp(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN", strlen("POWER_SUPPLY_ENERGY_FULL_DESIGN")) == 0) + if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN") || + BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN")) full_design = atoi(walk+1); - else if (strncmp(last, "POWER_SUPPLY_ENERGY_NOW", strlen("POWER_SUPPLY_ENERGY_NOW")) == 0) + else if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") || + BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW")) remaining = atoi(walk+1); - else if (strncmp(last, "POWER_SUPPLY_CURRENT_NOW", strlen("POWER_SUPPLY_CURRENT_NOW")) == 0) + else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW")) present_rate = atoi(walk+1); - else if (strncmp(last, "POWER_SUPPLY_STATUS=Charging", strlen("POWER_SUPPLY_STATUS=Charging")) == 0) - charging = true; + else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging")) + status = CS_CHARGING; + else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full")) + status = CS_FULL; } else if (*walk == '\n') last = walk+1; - close(fd); + (void)close(fd); if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) { - float time, perc; - if (charging) - time = ((float)full_design - (float)remaining) / (float)present_rate; - else time = ((float)remaining / (float)present_rate); - perc = ((float)remaining / (float)full_design); - - int seconds = (int)(time * 3600.0); - int hours = seconds / 3600; + float remaining_time; + int seconds, hours, minutes; + if (status == CS_CHARGING) + remaining_time = ((float)full_design - (float)remaining) / (float)present_rate; + else if (status == CS_DISCHARGING) + remaining_time = ((float)remaining / (float)present_rate); + else remaining_time = 0; + + seconds = (int)(remaining_time * 3600.0); + hours = seconds / 3600; seconds -= (hours * 3600); - int minutes = seconds / 60; + minutes = seconds / 60; seconds -= (minutes * 60); - sprintf(output, "%s %.02f%% %02d:%02d:%02d", (charging ? "CHR" : "BAT"), (perc * 100), hours, minutes, seconds); + (void)snprintf(part, sizeof(part), "%s %.02f%% %02d:%02d:%02d", + (status == CS_CHARGING ? "CHR" : + (status == CS_DISCHARGING ? "BAT" : "FULL")), + (((float)remaining / (float)full_design) * 100), + hours, minutes, seconds); } - return output; + return part; } /* - * Just parses /proc/net/wireless + * Just parses /proc/net/wireless looking for lines beginning with + * wlan_interface, extracting the quality of the link and adding the + * current IP address of wlan_interface. * */ static char *get_wireless_info() { char buf[1024]; - static char output[512]; + static char part[512]; char *interfaces; - memset(buf, '\0', sizeof(buf)); - memset(output, '\0', sizeof(output)); + int fd; + memset(buf, 0, sizeof(buf)); + memset(part, 0, sizeof(part)); - int fd = open("/proc/net/wireless", O_RDONLY); - read(fd, buf, sizeof(buf)); - close(fd); + if ((fd = open("/proc/net/wireless", O_RDONLY)) == -1) + die("Could not open /proc/net/wireless\n"); + (void)read(fd, buf, sizeof(buf)); + (void)close(fd); - interfaces = skip_character(buf, '\n', 2) + 1; - while (interfaces < buf+strlen(buf)) { + interfaces = skip_character(buf, '\n', 1) + 1; + while ((interfaces = skip_character(interfaces, '\n', 1)+1) < buf+strlen(buf)) { while (isspace((int)*interfaces)) interfaces++; - if (strncmp(interfaces, wlan_interface, strlen(wlan_interface)) == 0) { - /* Skip status field (0000) */ - interfaces += strlen(wlan_interface) + 2; - interfaces = skip_character(interfaces, ' ', 1); - while (isspace((int)*interfaces)) - interfaces++; - int quality = atoi(interfaces); - /* For some reason, I get 255 sometimes */ - if (quality == 255) - quality = 0; - snprintf(output, sizeof(output), "W: (%02d%%) ", quality); - return output; - } - interfaces = skip_character(interfaces, '\n', 1) + 1; + if (!BEGINS_WITH(interfaces, wlan_interface)) + continue; + int quality; + if (sscanf(interfaces, "%*[^:]: 0000 %d", &quality) != 1) + continue; + if ((quality == UCHAR_MAX) || (quality == 0)) { + if (use_colors) + (void)snprintf(part, sizeof(part), "%s%s", + concat("#FF0000 ", wmii_normcolors), " W: down"); + else (void)snprintf(part, sizeof(part), "W: down"); + } else (void)snprintf(part, sizeof(part), "W: (%03d%%) %s", + quality, get_ip_address(wlan_interface)); + return part; } - return output; + return part; } -static char *get_eth_info() { - static char output[512]; +/* + * Return the IP address for the given interface or "no IP" if the + * interface is up and running but hasn't got an IP address yet + * + */ +static const char *get_ip_address(const char *interface) { + static char part[512]; struct ifreq ifr; - memset(output, '\0', sizeof(output)); + struct sockaddr_in addr; + socklen_t len = sizeof(struct sockaddr_in); + memset(part, 0, sizeof(part)); - int fd = socket(AF_INET, SOCK_DGRAM, 0); + (void)strcpy(ifr.ifr_name, interface); + ifr.ifr_addr.sa_family = AF_INET; + if (ioctl(general_socket, SIOCGIFADDR, &ifr) < 0) + return NULL; - strcpy(ifr.ifr_name, eth_interface); - if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) { - printf("böses fehler\n"); - /* TODO: errorhandling */ - } - if (!(ifr.ifr_flags & IFF_UP) || - !(ifr.ifr_flags & IFF_RUNNING)) { - sprintf(output, "E: down"); - close(fd); - return output; + memcpy(&addr, &ifr.ifr_addr, len); + (void)inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, len); + if (strlen(part) == 0) + (void)snprintf(part, sizeof(part), "no IP"); + + return part; +} + +/* + * Combines ethernet IP addresses and speed (if requested) for displaying + * + */ +static char *get_eth_info() { + static char part[512]; + const char *ip_address = get_ip_address(eth_interface); + int ethspeed = 0; + + if (get_ethspeed) { +#ifdef LINUX + /* This code path requires root privileges */ + struct ifreq ifr; + struct ethtool_cmd ecmd; + + ecmd.cmd = ETHTOOL_GSET; + (void)memset(&ifr, 0, sizeof(ifr)); + ifr.ifr_data = (caddr_t)&ecmd; + (void)strcpy(ifr.ifr_name, eth_interface); + if (ioctl(general_socket, SIOCETHTOOL, &ifr) == 0) + ethspeed = (ecmd.speed == USHRT_MAX ? 0 : ecmd.speed); + else get_ethspeed = false; +#endif } - strcpy(ifr.ifr_name, eth_interface); - ifr.ifr_addr.sa_family = AF_INET; - if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) { - struct sockaddr_in addr; - memcpy(&addr, &ifr.ifr_addr, sizeof(struct sockaddr_in)); - inet_ntop(AF_INET, &addr.sin_addr.s_addr, output+3, sizeof(struct sockaddr_in)); - strncpy(output, "E: ", strlen("E: ")); - if (strlen(output) == 0) - sprintf(output, "E: no IP"); + if (ip_address == NULL) + (void)snprintf(part, sizeof(part), "E: down"); + else { + if (get_ethspeed) + (void)snprintf(part, sizeof(part), "E: %s (%d Mbit/s)", ip_address, ethspeed); + else (void)snprintf(part, sizeof(part), "E: %s", ip_address); } - close(fd); - return output; + return part; } -int main() { +/* + * Checks if the PID in path is still valid by checking if /proc/ exists + * + */ +static bool process_runs(const char *path) { + char pidbuf[512], + procbuf[512]; + static glob_t globbuf; + struct stat statbuf; + int fd; + memset(pidbuf, 0, sizeof(pidbuf)); + + if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0) + die("glob() failed\n"); + fd = open((globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path), O_RDONLY); + globfree(&globbuf); + if (fd < 0) + return false; + (void)read(fd, pidbuf, sizeof(pidbuf)); + (void)close(fd); + +#ifdef LINUX + (void)snprintf(procbuf, sizeof(procbuf), "/proc/%ld", strtol(pidbuf, NULL, 10)); + return (stat(procbuf, &statbuf) >= 0); +#else + /* TODO: correctly check for NetBSD. Evaluate if this runs on OpenBSD/FreeBSD */ + struct kinfo_proc info; + size_t length = sizeof(struct kinfo_proc); + int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, strtol(pidbuf, NULL, 10) }; + if (sysctl(mib, 4, &info, &length, NULL, 0) < 0) + return false; + return (length != 0); +#endif +} + +int main(int argc, char *argv[]) { char part[512], - *end; + pathbuf[512]; + unsigned int i; + int load_avg; - while (1) { - memset(output, '\0', sizeof(output)); - first_push = true; + char *configfile = PREFIX "/etc/wmiistatus.conf"; + int o, option_index = 0; + struct option long_options[] = { + {"config", required_argument, 0, 'c'}, + {"help", no_argument, 0, 'h'}, + {0, 0, 0, 0} + }; + + while ((o = getopt_long(argc, argv, "c:h", long_options, &option_index)) != -1) + if ((char)o == 'c') + configfile = optarg; + else if ((char)o == 'h') { + printf("wmiistatus (c) 2008-2009 Michael Stapelberg\n" + "Syntax: %s [-c ]\n", argv[0]); + return 0; + } - char *wireless_info = get_wireless_info(); - push_part(wireless_info, strlen(wireless_info)); + if (load_configuration(configfile) < 0) + return EXIT_FAILURE; - char *eth_info = get_eth_info(); - push_part(eth_info, strlen(eth_info)); + setup(); - char *battery_info = get_battery_info(); - push_part(battery_info, strlen(battery_info)); + if ((general_socket = socket(AF_INET, SOCK_DGRAM, 0)) == -1) + die("Could not create socket\n"); - - /* Get load */ - int load_avg = open("/proc/loadavg", O_RDONLY); - read(load_avg, part, sizeof(part)); - close(load_avg); - end = skip_character(part, ' ', 3); - push_part(part, (end-part)); + while (1) { + for (i = 0; i < num_run_watches; i += 2) { + bool running = process_runs(run_watches[i+1]); + if (use_colors) + snprintf(part, sizeof(part), "%s %s: %s", + (running ? + concat("#00FF00 ", wmii_normcolors) : + concat("#FF0000 ", wmii_normcolors)), + run_watches[i], + (running ? "yes" : "no")); + else snprintf(part, sizeof(part), "%s: %s", run_watches[i], (running ? "yes" : "no")); + snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]); + write_to_statusbar(pathbuf, part); + } - /* Get date & time */ - time_t current_time = time(NULL); - struct tm *current_tm = localtime(¤t_time); - strftime(part, sizeof(part), "%d.%m.%Y %H:%M:%S", current_tm); - push_part(part, strlen(part)); + if (wlan_interface) + write_to_statusbar(concat(order[ORDER_WLAN], "wlan"), get_wireless_info()); + if (eth_interface) + write_to_statusbar(concat(order[ORDER_ETH], "eth"), get_eth_info()); + if (battery_path) + write_to_statusbar(concat(order[ORDER_BATTERY], "battery"), get_battery_info()); - printf("output = %s\n", output); + /* Get load */ +#ifdef LINUX + if ((load_avg = open("/proc/loadavg", O_RDONLY)) == -1) + die("Could not open /proc/loadavg\n"); + (void)read(load_avg, part, sizeof(part)); + (void)close(load_avg); + *skip_character(part, ' ', 3) = '\0'; +#else + /* TODO: correctly check for NetBSD, check if it works the same on *BSD */ + struct loadavg load; + size_t length = sizeof(struct loadavg); + int mib[2] = { CTL_VM, VM_LOADAVG }; + if (sysctl(mib, 2, &load, &length, NULL, 0) < 0) + die("Could not sysctl({ CTL_VM, VM_LOADAVG })\n"); + double scale = load.fscale; + (void)snprintf(part, sizeof(part), "%.02f %.02f %.02f", + (double)load.ldavg[0] / scale, + (double)load.ldavg[1] / scale, + (double)load.ldavg[2] / scale); +#endif + write_to_statusbar(concat(order[ORDER_LOAD], "load"), part); - int fd = open("/mnt/wmii/rbar/status", O_RDWR); - write(fd, output, strlen(output)); - close(fd); + if (time_format) { + /* Get date & time */ + time_t current_time = time(NULL); + struct tm *current_tm = localtime(¤t_time); + (void)strftime(part, sizeof(part), time_format, current_tm); + write_to_statusbar(concat(order[ORDER_TIME], "time"), part); + } - sleep(1); + sleep(interval); } }